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How to calculate a time difference in C++
... Careful: This won't work if the user changes his time between Timer() and the call to elapsed() if !std::chrono::high_resolution_clock::is_steady - which is the case on Linux!
– jhasse
Feb 9 '18 at 12:33
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What are the barriers to understanding pointers and what can be done to overcome them? [closed]
Why are pointers such a leading factor of confusion for many new, and even old, college level students in C or C++? Are there any tools or thought processes that helped you understand how pointers work at the variable, function, and beyond level?
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Check whether a string matches a regex in JS
...fails because numbers don't have a match member). I'd reccomend explicitly converting your number to a string if you want to use it with a regex (String(123) for example).
– Bronzdragon
Jan 20 '19 at 14:47
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What data type to use for money in Java? [closed]
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You can use Money and Currency API (JSR 354). You can use this API in, provided you add appropriate dependencies to your project.
For Java 8, add the following reference implementation as a dependency to your pom.xml:
<dependency>
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Python equivalent for PHP's implode?
Is there an equivalent for PHP's implode in Python? I've read in and split up a set of delimited words, and now I want to sort them out in random orders and print the words out with spaces in between.
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Why is ArrayDeque better than LinkedList
I am trying to to understand why Java's ArrayDeque is better than Java's LinkedList as they both implement Deque interface.
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#1071 - Specified key was too long; max key length is 1000 bytes
...ing such long VARCHAR columns anyway, because the index will be very bulky and inefficient.
The best practice is to use prefix indexes so you're only indexing a left substring of the data. Most of your data will be a lot shorter than 255 characters anyway.
You can declare a prefix length per colu...
Choice between vector::resize() and vector::reserve()
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The two functions do vastly different things!
The resize() method (and passing argument to constructor is equivalent to that) will insert or delete appropriate number of elements to the vector to make it given size (it has optional second argument to specify their value). It will affect the ...
What tools to automatically inline CSS style to create email HTML code? [closed]
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Check the premailer.dialect.ca online converter or this Python script to do it.
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How to programmatically take a screenshot on Android?
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Here is the code that allowed my screenshot to be stored on an SD card and used later for whatever your needs are:
First, you need to add a proper permission to save the file:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
And this is the code (running in a...